package gui.storageunit;

import facades.StorageFacade;
import gui.common.*;
import gui.inventory.*;

import coreModel.HIT;
import coreModel.StorageUnit;

/**
 * Controller class for the edit storage unit view.
 */
public class EditStorageUnitController extends Controller 
implements IEditStorageUnitController {

	private ProductContainerData target;

	/**
	 * Constructor.
	 * 
	 * @param view Reference to edit storage unit view
	 * @param target The storage unit being edited
	 */
	public EditStorageUnitController(IView view, ProductContainerData target) {
		super(view);
		this.target=target;
		construct();
		
		
	}

	//
	// Controller overrides
	//

	/**
	 * Returns a reference to the view for this controller.
	 * 
	 * {@pre None}
	 * 
	 * {@post Returns a reference to the view for this controller.}
	 */
	@Override
	protected IEditStorageUnitView getView() {
		return (IEditStorageUnitView)super.getView();
	}

	/**
	 * Sets the enable/disable state of all components in the controller's view.
	 * A component should be enabled only if the user is currently
	 * allowed to interact with that component.
	 * 
	 * {@pre None}
	 * 
	 * {@post The enable/disable state of all components in the controller's view
	 * have been set appropriately.}
	 */
	@Override
	protected void enableComponents() 
	{
		boolean enable=true;
		try
		{
			if((getView().getStorageUnitName().length()>0 &&
					HIT.getInstance().canAddStorageUnit(
							new StorageUnit(getView().getStorageUnitName()))) ||
					target.getName().equals(getView().getStorageUnitName()))
			{
				enable&=true;
			}
			else
				enable=false;
		}
		catch(Exception e)
		{
			enable=false;
		}
		getView().enableOK(enable);

	}

	/**
	 * Loads data into the controller's view.
	 * 
	 *  {@pre None}
	 *  
	 *  {@post The controller has loaded data into its view}
	 */
	@Override
	protected void loadValues() 
	{
		if(target==null)
			return;
		getView().setStorageUnitName(target.getName());
	}

	//
	// IEditStorageUnitController overrides
	//

	/**
	 * This method is called when any of the fields in the
	 * edit storage unit view is changed by the user.
	 */
	@Override
	public void valuesChanged() 
	{
		enableComponents();
	}

	/**
	 * This method is called when the user clicks the "OK"
	 * button in the edit storage unit view.
	 */
	@Override
	public void editStorageUnit() 
	{
		if(target.getName().equals(getView().getStorageUnitName()))
		{
			return;
		}
		try
		{
			StorageFacade.getInstance().editStorageUnit((StorageUnit)target.getTag(),
					new StorageUnit(getView().getStorageUnitName()));
		}
		catch(Exception e)
		{
			e.printStackTrace();
		}
	}



}

